Home › Authors › David S. Westerman 👤 David S. Westerman 3 books Books by David S. Westerman Guidebook for field trips in Vermont 1987 Field trips of the Geological Field trips of the Geological Society of Maine, 1978-1983 1983 Structural analysis of the Gui Structural analysis of the Guilford, Dover-Foxcroft, and Boyd Lake 15-minute quadrangles, south-central Maine 1983